Effects of Curing Temperature on Electro-Optical Characteristics of a Polymer-Stabilized In-Plane-Switching Liquid Crystal Cell

Woo, Jiyong; Choi, Tae‐Hoon; Jeon, Byoung-Gyu; Yoon, Tae Hoon

doi:10.3390/cryst7090260

Cited by 7 publications

(2 citation statements)

References 20 publications

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“…Consequently, the polymer networks in the areas covered by the photomask became smaller and denser with the increase in temperature (Figure ). − The driving voltage increased due to the increased anchoring force of the polymer networks to the LCs caused by the smaller and denser polymer networks (Figure S7).…”

Section: Resultsmentioning

confidence: 99%

Preparation of Highly Durable Reverse-Mode Polymer-Stabilized Liquid Crystal Films with Polymer Walls

Ren

et al. 2022

ACS Appl. Mater. Interfaces

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Reverse-mode polymer-stabilized liquid crystal (PSLC) films have wide applications in smart windows for cars as well as buildings and dimming glasses due to their low haze, low energy consumption, and better safety in case of emergency power off. However, PSLC films usually have poor stability of electro-optical properties due to their low polymer content (ca. 5 wt %), and it still remains a challenging task to improve the stability and processability by increasing the polymer content in PSLC as the driving voltage might dramatically increase. In this work, a reverse-mode PSLC film with polymer walls was prepared, which showed excellent stability of electro-optical properties even after 150 000 cycles. The film was prepared through polymerization with a photomask, in which the monomers concentrated on specific areas to form patterned polymer walls. In this way, the polymer content could be increased dramatically and the anchoring effect would not be too strong, thus avoiding a sharp increase in the driving voltage. As a result, the desired reverse-mode film with high stability, relatively low driving voltage, and high contrast ratio was obtained. The effects of monomer compositions, curing temperature, UV light intensity, and the pattern of the photomask on the microstructures, as well as electro-optical performances of the films were carefully studied. This work provides a new idea for the preparation of reverse-mode electrically switchable light-transmittance controllable films with excellent stability and good electro-optical performance, which would broaden their application in smart cars, building windows, and dimming glasses for light management and potential energy saving.

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Section: Resultsmentioning

confidence: 99%

Preparation of Highly Durable Reverse-Mode Polymer-Stabilized Liquid Crystal Films with Polymer Walls

Ren

et al. 2022

ACS Appl. Mater. Interfaces

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“…This characteristic leads to special physical properties including birefringence, anisotropic scattering, and anisotropic responses to external fields. Nematic LC-gel composite systems are known for Polymer Dispersed Liquid Crystal (PDLC) [21][22][23][24] and Polymer Stabilized Liquid Crystal (PSLC) [25][26][27][28][29]. In the normal mode LC composite films are opaque (scattering state) when the applied voltage is OFF state and transparent when the applied voltage is ON state (above the switching voltage).…”

Section: Introductionmentioning

confidence: 99%

Effects of quenching temperature on threshold, driving voltage and morphology of reverse mode liquid crystal gel films

Chen

Hsu

2023

Mater. Res. Express

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We have demonstrated that the electro-optical properties and morphology of the reverse mode liquid crystal (LC) gel films are strongly influenced by the quenching temperature (TQ) during the manufacturing processes. These composite films were self-assembled using LC and gelator molecules through different TQ (70, 80, 90, 100, 110 and 120 °C) to a cold brine (−15 °C). As TQ increased, the morphology of the gel in the polarized light microscope images are changed from neatly arranged fiber-like patterns to random disordered networks, and the threshold and driving voltages of the films are reduced accordingly. To further investigate the gelation processes we adopted the steady cooling rates (3, 10 and 30 °C/min) to the films, the corresponding morphologies of the films were carefully inspected and compared with those of the quenched films.

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Effect of CdSeS/ZnS quantum dot concentration on the electro-optical and dielectric properties of polymer stabilized liquid crystal

Kocakülah

Algul

Köysal

2020

Journal of Molecular Liquids

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Effects of Curing Temperature on Electro-Optical Characteristics of a Polymer-Stabilized In-Plane-Switching Liquid Crystal Cell

Cited by 7 publications

References 20 publications

Preparation of Highly Durable Reverse-Mode Polymer-Stabilized Liquid Crystal Films with Polymer Walls

Preparation of Highly Durable Reverse-Mode Polymer-Stabilized Liquid Crystal Films with Polymer Walls

Effects of quenching temperature on threshold, driving voltage and morphology of reverse mode liquid crystal gel films

Effect of CdSeS/ZnS quantum dot concentration on the electro-optical and dielectric properties of polymer stabilized liquid crystal

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